Tooltip angular material

Html
<button mat-raised-button
        matTooltip="Info about the action"
        aria-label="Button that displays a tooltip when focused or hovered over">
  Action
</button>

TS
import {Component} from '@angular/core';

/**
 * @title Basic tooltip
 */
@Component({
  selector: 'tooltip-overview-example',
  templateUrl: 'tooltip-overview-example.html',
  styleUrls: ['tooltip-overview-example.css'],
})
export class TooltipOverviewExample {}